Implement BR_CC and BRTWOWAY_CC. This allows the removal of a rather nasty

fixme from the PowerPC backend.  Emit slightly better code for legalizing
select_cc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22805 91177308-0d34-0410-b5e6-96231b3b80d8

7 files changed, 16 insertions, 18 deletions

diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index e898916f80..c0ae2acf97 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -90,6 +90,7 @@ namespace {
       addRegisterClass(MVT::f32, Alpha::FPRCRegisterClass);
 
       setOperationAction(ISD::BRCONDTWOWAY, MVT::Other, Expand);
+      setOperationAction(ISD::BRTWOWAY_CC,  MVT::Other, Expand);
 
       setOperationAction(ISD::EXTLOAD, MVT::i1,  Promote);
       setOperationAction(ISD::EXTLOAD, MVT::f32, Expand);
diff --git a/lib/Target/IA64/IA64ISelPattern.cpp b/lib/Target/IA64/IA64ISelPattern.cpp
index 5428a8b9ed..f4231a3f85 100644
--- a/lib/Target/IA64/IA64ISelPattern.cpp
+++ b/lib/Target/IA64/IA64ISelPattern.cpp
@@ -57,6 +57,7 @@ namespace {
       addRegisterClass(MVT::i1, IA64::PRRegisterClass);
 
       setOperationAction(ISD::BRCONDTWOWAY     , MVT::Other, Expand);
+      setOperationAction(ISD::BRTWOWAY_CC      , MVT::Other, Expand);
       setOperationAction(ISD::FP_ROUND_INREG   , MVT::f32  , Expand);
 
       setSetCCResultType(MVT::i1);
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index d06542d6b1..cd2fc16d09 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -66,6 +66,10 @@ PPC32TargetLowering::PPC32TargetLowering(TargetMachine &TM)
   setOperationAction(ISD::SELECT, MVT::i32, Expand);
   setOperationAction(ISD::SELECT, MVT::f32, Expand);
   setOperationAction(ISD::SELECT, MVT::f64, Expand);
+
+  // PowerPC does not have BRCOND* which requires SetCC
+  setOperationAction(ISD::BRCOND,       MVT::Other, Expand);
+  setOperationAction(ISD::BRCONDTWOWAY, MVT::Other, Expand);
   
   // PowerPC does not have FP_TO_UINT
   setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp
index 75f568f349..4e674dc569 100644
--- a/lib/Target/PowerPC/PPCISelPattern.cpp
+++ b/lib/Target/PowerPC/PPCISelPattern.cpp
@@ -713,22 +713,11 @@ unsigned ISel::SelectAddr(SDOperand N, unsigned& Reg, int& offset)
 void ISel::SelectBranchCC(SDOperand N)
 {
   MachineBasicBlock *Dest =
-    cast<BasicBlockSDNode>(N.getOperand(2))->getBasicBlock();
+    cast<BasicBlockSDNode>(N.getOperand(4))->getBasicBlock();
 
   Select(N.getOperand(0));  //chain
-  
-  // FIXME: Until we have Branch_CC and Branch_Twoway_CC, we're going to have to
-  // Fake it up by hand by checking to see if op 1 is a SetCC, or a boolean.
-  unsigned CCReg;
-  ISD::CondCode CC;
-  SDOperand Cond = N.getOperand(1);
-  if (Cond.getOpcode() == ISD::SETCC) {
-    CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
-    CCReg = SelectCC(Cond.getOperand(0), Cond.getOperand(1), CC);
-  } else {
-    CC = ISD::SETNE;
-    CCReg = SelectCC(Cond, ISelDAG->getConstant(0, Cond.getValueType()), CC);
-  }
+  ISD::CondCode CC = cast<CondCodeSDNode>(N.getOperand(1))->get();
+  unsigned CCReg = SelectCC(N.getOperand(2), N.getOperand(3), CC);
   unsigned Opc = getBCCForSetCC(CC);
 
   // Iterate to the next basic block
@@ -739,9 +728,9 @@ void ISel::SelectBranchCC(SDOperand N)
   // and build a PowerPC branch pseudo-op, suitable for long branch conversion
   // if necessary by the branch selection pass.  Otherwise, emit a standard
   // conditional branch.
-  if (N.getOpcode() == ISD::BRCONDTWOWAY) {
+  if (N.getOpcode() == ISD::BRTWOWAY_CC) {
     MachineBasicBlock *Fallthrough =
-      cast<BasicBlockSDNode>(N.getOperand(3))->getBasicBlock();
+      cast<BasicBlockSDNode>(N.getOperand(5))->getBasicBlock();
     if (Dest != It) {
       BuildMI(BB, PPC::COND_BRANCH, 4).addReg(CCReg).addImm(Opc)
         .addMBB(Dest).addMBB(Fallthrough);
@@ -1882,8 +1871,8 @@ void ISel::Select(SDOperand N) {
     BuildMI(BB, PPC::B, 1).addMBB(Dest);
     return;
   }
-  case ISD::BRCOND:
-  case ISD::BRCONDTWOWAY:
+  case ISD::BR_CC:
+  case ISD::BRTWOWAY_CC:
     SelectBranchCC(N);
     return;
   case ISD::CopyToReg:
diff --git a/lib/Target/Sparc/SparcV8ISelPattern.cpp b/lib/Target/Sparc/SparcV8ISelPattern.cpp
index 346f058cdc..754c16b6ef 100644
--- a/lib/Target/Sparc/SparcV8ISelPattern.cpp
+++ b/lib/Target/Sparc/SparcV8ISelPattern.cpp
@@ -55,6 +55,7 @@ namespace {
       addRegisterClass(MVT::f32, V8::FPRCRegisterClass);
 
       setOperationAction(ISD::BRCONDTWOWAY, MVT::Other, Expand);
+      setOperationAction(ISD::BRTWOWAY_CC,  MVT::Other, Expand);
       setOperationAction(ISD::EXTLOAD, MVT::i1,  Promote);
       setOperationAction(ISD::EXTLOAD, MVT::f32, Promote);
 
diff --git a/lib/Target/SparcV8/SparcV8ISelPattern.cpp b/lib/Target/SparcV8/SparcV8ISelPattern.cpp
index 346f058cdc..754c16b6ef 100644
--- a/lib/Target/SparcV8/SparcV8ISelPattern.cpp
+++ b/lib/Target/SparcV8/SparcV8ISelPattern.cpp
@@ -55,6 +55,7 @@ namespace {
       addRegisterClass(MVT::f32, V8::FPRCRegisterClass);
 
       setOperationAction(ISD::BRCONDTWOWAY, MVT::Other, Expand);
+      setOperationAction(ISD::BRTWOWAY_CC,  MVT::Other, Expand);
       setOperationAction(ISD::EXTLOAD, MVT::i1,  Promote);
       setOperationAction(ISD::EXTLOAD, MVT::f32, Promote);
 
diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp
index db95e91864..6ff8c723f5 100644
--- a/lib/Target/X86/X86ISelPattern.cpp
+++ b/lib/Target/X86/X86ISelPattern.cpp
@@ -152,6 +152,7 @@ namespace {
       setOperationAction(ISD::FP_TO_SINT       , MVT::i16  , Promote);
 
       setOperationAction(ISD::BRCONDTWOWAY     , MVT::Other, Expand);
+      setOperationAction(ISD::BRTWOWAY_CC      , MVT::Other, Expand);
       setOperationAction(ISD::MEMMOVE          , MVT::Other, Expand);
       setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16  , Expand);
       setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1   , Expand);